Structural Strength Analysis of FRP Yacht

FRP referred to fiber reinforced plastics is a sort of glass fiber reinforced composite plastic. It is based on the glass fiber and its products as the reinforcing material, a synthetic resin which is a kind of composite material as the basic material. Glass fiber reinforced plastic, by virtue of their high strength, seawater resistant, anti-microbial attachment performance, capable of absorbing large impact energy, easy to shape, good appearance, long life, and many traditional shipbuilding materials incomparable advantages, favors much by shipbuilding sector especially for the construction of medium and small yachts and high-speed vessels.

Compared with the same scale and cross-section of the steel ship, the stiffness of the fiberglass boat is much smaller than the steel one. Therefore, in order to meet the strength requirements, fiberglass boat is different in the structural form with steel boats. The selection and design of composite material also has its particularity, which are worth exploring a range of issues. Such as, the stiffened panel can greatly save structural materials to reduce the weight of the structure. So the structure of the ship and marine structures as well as many important force components are made from reinforced plate and shell structures ;  FRP material because of its low modulus of elasticity and easy to produce distortions and bending deformation, therefore FRP ship need to adopt a particular cross-section in the form. Usually, FRP ship's skeleton beam material will adopt trapezoidal top-hat cross-section;  The angle-ply laminates with a certain direction angle ensure the layers interweaved. Most structure need a layer of foam core material in the middle. Even though the mechanical properties of the core material is relatively low, but shear strength of whole structure is mainly borne by core material. The only takes some role in the shear. 

The problems mentioned above, were not given a relatively reliable solutions by the existing norms in many ways. Moreover, the rapid development of new yachts call for higher requirements of direct global ship structure calculation based on finite element analysis. 

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